As developers, we all know that the scariest bugs are the ones you didn’t see coming.
Recently, I almost introduced one into production — until CodeProt caught it during my pull request review.
The Bug That Slipped Through My Eyes 👀
Here’s the code snippet from my PR:
if len(lines) >= relevant_lines_start-1:
relevant_line_in_file = lines[relevant_lines_start - 1]
else:
relevant_line_in_file = ""
At first glance, it looked fine.
But CodeProt flagged it as a Potential Index Out of Bounds.
When relevant_lines_start = 1 and len(lines) = 1, the condition passes → accessing lines[0] is fine.
But when relevant_lines_start = len(lines) + 1, the condition still passes → accessing lines[len(lines)] triggers an IndexError.
This was a real edge case:
Unit tests didn’t cover it.
I didn’t notice it in my manual review.
But in production, it could have crashed a batch processing job.
More Than Just Bug Detection 🔎
CodeProt didn’t stop there. In the same PR review, it highlighted two more issues:
Complex Batch Processing Logic
My flush_batch() function had nested loops + dynamic batch adjustments.
This made debugging harder and increased the risk of subtle errors.
👉 CodeProt suggested breaking it down into smaller, testable functions.
Potential Resource Leak
I was committing transactions inside a loop, but without proper cleanup on exceptions.
👉 In production, this could leave the transaction state inconsistent.
These aren’t the kind of problems a linter or formatter will catch.
They’re the kind of problems that haunt you at 3 AM on a production incident call.
Why I Recommend CodeProt ✅
Catches edge cases you miss — even in code you’re “sure” is safe.
Security & consistency checks built-in — flags resource leaks, SQL injection risks, and unsafe patterns.
Developer-friendly workflow — review results appear directly in the PR as comments, no context-switching.
ROI positive — the cost of one avoided production bug often exceeds months of subscription fees.
Final Thoughts
That PR review convinced me:
CodeProt isn’t just a “nice-to-have tool”. It’s a safety net.
It helped me avoid shipping a bug that would have broken production.
And now, my team uses it on every PR by default.
If you care about writing safer, more reliable code, check it out:
👉 https://codeprot.com
💡 Question to the community:
What’s the worst production bug you’ve shipped because of a missed edge case?
Would a tool like CodeProt have saved you?
Top comments (1)
Caught an edge-case bug before it hit production